SL 300 series lasers are an excellent solution for applications that require high energy picosecond pulses.

Pulse compression during backward‑stimulated Brillouin scattering (SBS), used in EKSPLA SL300 series lasers, is a simple and cost‑efficient way to generate picosecond pulses, with the unique capability of producing pulses with tunable duration.

An electro-optically Q-switched Single Longitudinal Mode (SLM) nanosecond generator is the heart of the system. Instead of external narrow linewidth diode lasers, the selective properties of Fabry-Perrot etalon, and a laser cavity are used to produce SLM pulses with a smooth temporal envelope. In scientific literature this method of generating SLM pulses is known as a selfseeding technique.

Pulse compression is done in a SBS‑cell. Depending on the geometry of interaction, a pulse with duration in the 170 – 1500 ps range can be produced. Pulse duration can be tuned in discrete steps when a variable pulse duration option (-VPx) is installed.

After SBS compression, the pulse is directed to a multi-pass power amplifier system for amplification to up to 500 mJ energy. Temperature controlled harmonics generators, based on angle-tuned KD*P and KDP crystals and harmonic separation optics, are available as standard options. Each wavelength has a separate output port.

A power supply and cooling units are placed in a standard 19” rack that requires little space under an optical table.

The very low jitter of the optical pulse relative to the Q-switch triggering pulse ensures reliable synchronization of the laser with external equipment.

For customer convenience the laser can be controlled from a user-friendly remote control pad or RS232 interface.

The remote pad allows easy control of all laser parameters and features a backlit display that is easy to read even when wearing laser safety eyewear. Alternatively, the laser can be controlled from a personal computer with supplied software for a Windows™ operating system. LabView™ drivers are supplied as well.

Tab 2

Specifications 1)

Model

SL330

SL332

SL333

SL334

Max. pulse energy

at 1064 nm

30 mJ

150 mJ

250 mJ

500 mJ

at 532 nm2)

12 mJ

70 mJ

120 mJ

240 mJ

at 355 nm3)

7 mJ

40 mJ

80 mJ

140 mJ

at 266 nm4)

4 mJ

25 mJ

40 mJ

80 mJ

at 213 nm5)

2 mJ

10 mJ

15 mJ

25 mJ

Pulse energy stability (Std. Dev), % 6)

at 1064 nm

6 %

4 %

at 532 nm

8 %

7 %

at 355 nm

10 %

9 %

at 266 nm

13 %

12 %

at 213 nm

15 %

15 %

Pulse duration at 1064 nm (FWHM) 7)

150 ± 20 ps

170 ± 20 ps

Pulse duration stability at 1064 nm 8)

10 % (Std. Dev.)

Repetition rate 9)

10 or 50 Hz

10 Hz

5 Hz

Linewidth

≤ 0.1 cm-1

Polarization

linear,>50:1

Optical pulse jitter10)

0.5 ns

Beam profile11)

Hat-Top, >70% fit to Gaussian

Beam pointing stability at 1064 nm12)

50 µrad

Beam divergence 13)

<0.5 mrad

Beam height

170 ± 5 mm

Pre-pulse contrast ratio

105:1

Beam diameter14)

~6 mm

~8 mm

~10 mm

~12 mm

Physical characteristics

Laser head size (WxLxH)

255x790x240 mm

305x990x260 mm

Electric cabinet size (WxLxH)

550x600x530 mm

550x600x850 mm

Umbilical length

2.5 m

Operating requirements

Water consumption (max 20 °C)

< 10 l/min

Room temperature

18-27 °C

Relative humidity (non-condensing)

10-80 %

Power requirements 15)

208 or 230 V AC, single phase, 50-60 Hz

208 or 380 V AC, three phase, 50-60 Hz

Power consumption 16)

<1.5 kVA

<2.5 kVA

<3.5 kVA

<3.5 kVA

1) Due to continuous improvement, all specifications are subject to change without notice. For latest product information please visit EKSPLA. Parameters marked typical are not specifications. They are indications of typical performance and will vary with each unit we manufacture. Unless stated otherwise, all specifications are measured at 1064 nm.

2) For -SH option. Outputs are not simultaneous. Please inquire for pulse energies at other wavelengths.

3) For -TH option. Outputs are not simultaneous. Please inquire for pulse energies at other wavelengths.

4) For -FH option. Outputs are not simultaneous. Please inquire for pulse energies at other wavelengths.

5) For -FiH option. Outputs are not simultaneous. Please inquire for pulse energies at other wavelengths.